Valve-actuating means



NQV. 20,1923. 1,475,123

F. E. LAIRD VALVE ACTUATING MEANS Filed Dec. 2, 1919 WITNESS: INV EN TOR.

. BY fivdli'liaircl /W% /214 A TTORNE Y.

Patented Nov. 1823.-

Fri 1 vA vE-no'rUArrNGKenn-us.

Application filed necember'aisia Serial No. canes-e.

T all whom it may concern:

Be it known that I, Fnnonlon LAIRD,.

a citizen of the United States, residing at Tarrytown, in the county of lVestchester and State of New York, have invcntednew and useful Improvements in Valve-Actuating Means, of which the following is a specification. c l

This invention relates to improvements l0 in valve controlling means and the principal object of the invention is to provide means for controlling the movement of the valve by fluid pressure or a vacuum.

Another object of the invention is to provide means whereby the device may be adjusted to act under any desired pressure.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail,

reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a sectional View of the invention.

Figure 2 is a view of a modification.

In Figure 1, 1 indicates the valve casing in which is located a valve for controlling the supply of steam or other fluid to an engine or the like. A frame 4 is located on said casing and the valve rod 2 of valve 2 projects into said frame. The upper part of this frame carries a ring shaped plate 5 and a cover plate 6 is bolted to this plate 5 with a diaphragm 7 between the plates. Thus the cover plate and diaphragm forms a chamber 8. The cover plate is formed with an inlet port 9, which may be suitably connected with a steam supply or other source of pressure so that the pressure will move the diaphragm. A

rod 10 is connect-ed with the. said diaphragm and this rod passes through the guide 11 which forms part of the frame. The lower end of the rod 10 is provided with a head 12 having a recess 13 therein and a wedge 14 thereon. A head 15 is carried by the valve rod 2 and this head is provided with a reduced extension 16 which fits in the downwardly. The handle 21 is provided recess of the head 12. A lever 17 is pivotedto haverocking movement in the frame i and the inner end ofthis lever is provided with a V-shapcd recess 18 which is engaged by the wedge 14. A weight 19 is adjustably connected with the outer end of saidlever (30 by the thumb bolt 20.' A handle 21 is slidably mounted in the frame below lever 17 and this handle is pivotally. connected with a slotted rod 22, one slot of which engages a pin 23 on the head'15 of the valve rod. The inner part of lever 17 is slotted and a, link 24 adjustably connects the lever with the rod 22, said link being connected with the said parts by the thumb bolts 25, which passes through the slots in the lever and rod. The handle 21 may be held in adjusted position by means of a bolt 21 It will be seen that the weighted lever tends to hold the diaphragm in its upper position but when the diaphragm is forced downwardly by the pressure within the chamber 8 the weighted lever is rocked and thus movement is communicated to the valve rod by means of the link 24 and the rod 22. By moving the handle 21 the fulcrum point of lever 22 is changed and thus the movements of the parts are increased or diminished and the amount of movement of the valve made more or less.

In the modification shown in Figure 2 85 the diaphragm is actuated by a vacuum instead of pressure so that rod 10 moved upwardly instead of downwardly so in order to communicate this movement to the valve I locate the fulcrum point of .rod 22 to the opposite side of link 24 from that shown in the first figure. so that as the rod 10 and weighted lever 17 moves upwardly the pin 23 and valve stem will move with an upwardly extending part 2O which carries the pivot pin 21". lnother respects this arrangement of parts is similar to that above described.

From the above it will be apparent that a valve for controlling a pipeline can be adjusted in relation to its seat by fluid-under pressure introduced into chamber 8 or by a vacuum produced in said chamber. My invention can be used for maintaining a constant supply of steam to an engine by connecting the chamber 8 with the boiler or other source of steam supply which fur-f nishes steam to the engine. If the pressure in the boilershould increase the increased pressure in chamber 8 would act upon the parts to move the valve to reduce the supply of steam to the engine. Of course the chamber 8 can be connected with a separate source of supply so that the valve could be actuated from this separate source.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall Within the scope of the appended claim.

\Vhat I claim is A governor of the character described supply, a diaphragm disposed in said chambeing associated with the depending rod,

a handle arranged for longitudinal movement through the frame and disposed in parallelism with the rocking lever, a rod pivotally secured to the inner end of the handle and being provided with a pair oi spaced elongated openings, a pin projecting from the valve rod and engaging the adjacent slot of the last mentioned rod and a link adjustably connecting the slotted rod with the rocking lever as and for the purpose specified.

In testimony whereof I aflix my signature.

FREDRICK E. LAIRD. 

